OSL response of alpha-Al2O3:C, Mg exposed to beta and UVC radiation: A comparative investigation

Autor(es)

Munoz, J. M. ^[1] ; Lima, L. S. ^[2] ; Yoshimura, E. M. ^[2] ; Jacobsohn, L. G. ^[3] ; Trindade, N. M. ^{[2, 1]}

Afiliação do(s) autor(es)

^[1] Fed Inst Educ Sci & Technol Sao Paulo, Dept Phys, Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Inst Phys, Sao Paulo, SP - Brazil

^[3] Clemson Univ, Dept Mat Sci & Engn, Clemson, SC - USA

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 236, AUG 2021.
• Citações Web of Science: 0

Resumo

Continuous wave optically stimulated luminescence (CW-OSL) of an Al2O3:C, Mg single crystal was investigated after irradiation with ultraviolet C radiation (UVC; peak emission at 254 nm) as well as with a beta source under different doses (100 mGy - 3 Gy). Analysis of the OSL decay curves provided experimental evidence that: i) UVC-and beta-irradiated Al2O3:C, Mg single crystal showed similar OSL decay curves, and that ii) a same fast (tau similar to 2.9 s) and a same slow (tau similar to 29 s) components were identified in the OSL decay curves for both types of radiation. On the other hand, analysis of the results suggested that radiation type generated distinct initial concentration of charges trapped at these two traps. The differences in the OSL decay curves were attributed either to differences in the initial population of the traps or to a balance of trapping-detrapping during UV irradiation. (AU)

• Processo FAPESP: 19/05915-3 - Caracterização de minerais para dosimetria luminescente das radiações ionizantes
• Beneficiário: Neilo Marcos Trindade
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/22375-2 - Estudo dos parâmetros cinéticos dos picos termoluminescentes de Al2O3:C,Mg
• Beneficiário: Juan Matheus Munoz
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 18/05982-0 - P&D&I em metrologia das radiações na área da saúde
• Beneficiário: Linda Viola Ehlin Caldas
• Modalidade de apoio: Auxílio à Pesquisa - Temático